74ABT16374 Fairchild Semiconductor, 74ABT16374 Datasheet - Page 2
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74ABT16374
Manufacturer Part Number
74ABT16374
Description
16-Bit D-Type Flip-Flop with 3-STATE Outputs
Manufacturer
Fairchild Semiconductor
Datasheet
1.74ABT16374.pdf
(6 pages)
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Functional Description
The ABT16374 consists of sixteen edge-triggered flip-flops
with individual D-type inputs and 3-STATE true outputs.
The device is byte controlled with each byte functioning
identically, but independent of the other. The control pins
can be shorted together to obtain full 16-bit operation.
Each byte has a buffered clock and buffered Output Enable
common to all flip-flops within that byte. The description
which follows applies to each byte. Each flip-flop will store
the state of their individual D inputs that meet the setup and
hold time requirements on the LOW-to-HIGH Clock (CP
transition. With the Output Enable (OE
tents of the flip-flops are available at the outputs. When
OE
Operation of the OE
flip-flops.
Logic Diagrams
n
is HIGH, the outputs go to the high impedance state.
n
input does not affect the state of the
n
) LOW, the con-
Byte 2 (8:15)
Byte 1 (0:7)
n
)
2
Truth Tables
H
L
X
Z
LOW Voltage Level
High Impedance
HIGH Voltage Level
Immaterial
CP
CP
X
X
L
L
2
1
OE
OE
Inputs
Inputs
H
L
L
L
H
L
L
L
2
1
D
D
8
0
–D
H
X
X
H
X
X
L
–D
L
15
7
(Previous)
(Previous)
Outputs
Outputs
O
O
8
0
–O
H
Z
–O
L
H
L
Z
15
7